You can really build just about anything using Lego pieces, as proven by Slovenia-based LPE Power. The company specializes in making fully assembled working scale models of various engines, including the V8 shown here. It’s patterned after a Ford Mustang engine and will rev up to 2,200 revs per minute using compressed air to activate the 31 moving parts, including pistons, crankshaft, balance shaft and valves. The engine weights less than a pound and is only about four inches long by five wide and five tall. Check out the video of a working engine and order one for about $330 (including worldwide shipping) at www.LPEpower.com.